Recover archive table

[Ryan Hatfield]

I have an InnoDB table that I use for logging. Every few months I create a new one, rename the old one, and convert the old one into an archive using the Archive storage engine. I've been doing this for around 8 years without issue.

This last time however I got a warning stating "Engine error 1" or "Engine error -1" (can't remember which but it was definitely a 1). When I select on the new archive table I get no results. If I perform a check table it takes several minutes and comes back stating the table is corrupt. The size of the ARZ file is roughly what I would expect based on the the size of previous archive tables and relative number of records. So I know the data is there. When I perform a CHECK TABLE it tells me it is corrupt. When I attempt a repair (I've tried all options) it truncates it each time.

I'm on MySQL 5.7 and the only information I can find for my case is an old file called archive_reader written by Twitter over 13 years ago and not updated in more than 9.5 years. I have my doubts this will help me given it was written for MySQL 5.1.

Is there anything that I can use to recover this data? It isn't mission critical but I have a gap now of about 6 months that I might one day need to reference (debugging, legal, etc).